对采用矿渣硅酸盐水泥拌制的普通混凝土，其覆盖浇水养护时间不得少于()天。
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圆盘锯和电平刨都应装设开关箱，开关箱与设备间距离不大于()。
A. 3m
B. 5m
C. 6m
D. 任意长
The equilibrium rate of interest in China is determined by______.
A. the People's Bank of China
B. the China Banking Regulatory Commission
C. the Ministry of Finance
D. both the supply of and demand for money
The higher the required reserve ratio,______.
A. the larger the deposit expansion multiplier
B. the smaller the deposit expansion multiplier
C. the more excess reserves there are after each round of the money-creation process
D. the more money that can be lent in each round of the money-creation process
在单因子试验中A有2个水平，每一水平下进行了3次试验，并求得因子与误差平方和分别为 SA＝56.29，Ssub＞E＝48.77，那么检验用F比是()。
A. 4.62
B. 4.65
C. 6.15
D. 6.54
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